"Portrait of William Pitt, 1st Earl of Chatham" by Jean André Rouquet at the Victoria and Albert Museum, London - More commonly known as William Pitt the Elder (to distinguish him from his son William Pitt the Younger), this was the British Secretary of State during the Seven Years War and many victories have been attributed to his policies. This is why, for instance, when the British took Fort Duquesne from the French, they renamed it Fort Pitt - now the city of Pittsburgh, Pennsylvania.
15.8; Houston, Richard (Printmaker), Hoare, William (after); William Pitt, 1st Earl of Chatham, 1766 "The painter William Hoare produced numerous adaptations of his portrait of William Pitt, prime minister of England. This print was issued in 1766, the year Pitt assumed the post of prime minister for the second time."
(William's father) "Portrait of William Pitt, Earl of Chatham" by Richard Brompton (1772) at the Philadelphia Museum of Art, Philadelphia - From the curators' comments: "As a member of the British parliament from 1735 to 1761 and prime minister from 1766 to 1768, William Pitt the Elder advocated for an amiable relationship between Great Britain and the colonies, opposing the Stamp Act and military action in America."